litigator vs defendant

litigator and defendant both are nouns.

Word	Noun	Adjective	Verb	Adverb
litigator	Yes	No	No	No
defendant	Yes	No	No	No

As nouns, defendant is a hyponym of litigator; that is, defendant is a word with a more specific, narrower meaning than litigator:

litigator: (law) a party to a lawsuit; someone involved in litigation
defendant: a person or institution against whom an action is brought in a court of law; the person being sued or accused

Other hyponyms of litigator include suspect, appellant, plaintiff in error, filer, complainant, plaintiff, prevailing party.

litigator (noun)	defendant (noun)
(law) a party to a lawsuit; someone involved in litigation	a person or institution against whom an action is brought in a court of law; the person being sued or accused